package cn.itcast.bos.web.action.base;


import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.ss.formula.functions.T;
import org.springframework.data.domain.Page;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
//代码重构优化
public class BaseAction<T> extends ActionSupport implements ModelDriven<T> {

	//模型驱动抽取
	protected T model;
	@Override
	public T getModel() {
		
		return model;
	}

	//构造器完成model实例化
	public BaseAction(){
		//构造子类action对象,获取继承父类型的泛型
		//AreaAction extends BaseAction<Area>
		//BaseAction<Area>
		Type genericSuperclass = this.getClass().getGenericSuperclass();
		//获取类型第一个泛型参数
		ParameterizedType parameterizedType=(ParameterizedType) genericSuperclass;
		Class<T> modelClass=(Class<T>) parameterizedType.getActualTypeArguments()[0];
		try {
			model=modelClass.newInstance();
		} catch (InstantiationException | IllegalAccessException e) {
			e.printStackTrace();
			System.out.println("模型构造失败...");
		}
	}
	
	//优化分页代码
	protected int page;
	protected int rows;
	public void setPage(int page) {
		this.page = page;
	}

	public void setRows(int rows) {
		this.rows = rows;
	}
	//将分页查询结果数据压入值栈的方法
	public void pushPageDataToValueStack(Page<T> pageData){
		Map<String, Object> result=new HashMap<String,Object>();
		result.put("total",pageData.getTotalElements());
		result.put("rows", pageData.getContent());
		//将封装后的数据压入值栈顶部
		ActionContext.getContext().getValueStack().push(result);
	}
	
	
}
